Exclude tags w/o category from classifying; remove obsolete models

modules/joex/src/main/scala/docspell/joex/learn/ClassifierName.scala

@@ -2,8 +2,12 @@ package docspell.joex.learn
 
 import cats.data.NonEmptyList
 import cats.implicits._
+
 import docspell.common.Ident
+import docspell.store.qb.DSL._
+import docspell.store.qb._
 import docspell.store.records.{RClassifierModel, RTag}
+
 import doobie._
 
 final class ClassifierName(val name: String) extends AnyVal
@@ -12,9 +16,6 @@ object ClassifierName {
   def apply(name: String): ClassifierName =
     new ClassifierName(name)
 
-  val noCategory: ClassifierName =
-    apply("__docspell_no_category__")
-
   val categoryPrefix = "tagcategory-"
 
   def tagCategory(cat: String): ClassifierName =
@@ -34,7 +35,7 @@ object ClassifierName {
 
   def findTagModels[F[_]](coll: Ident): ConnectionIO[List[RClassifierModel]] =
     for {
-      categories <- RTag.listCategories(coll, noCategory.name)
+      categories <- RTag.listCategories(coll)
       models <- NonEmptyList.fromList(categories) match {
         case Some(nel) =>
           RClassifierModel.findAllByName(coll, nel.map(tagCategory).map(_.name))
@@ -42,4 +43,23 @@ object ClassifierName {
           List.empty[RClassifierModel].pure[ConnectionIO]
       }
     } yield models
+
+  def findOrphanTagModels[F[_]](coll: Ident): ConnectionIO[List[RClassifierModel]] = {
+    val model = RClassifierModel.as("m")
+    val tag   = RTag.as("t")
+    val sql =
+      Select(
+        select(model.all),
+        from(model),
+        model.cid === coll && model.name.notIn(
+          Select(
+            select(concat(lit(categoryPrefix), tag.category.s)),
+            from(tag),
+            tag.cid === coll && tag.category.isNotNull
+          ).distinct
+        )
+      ).build
+    sql.query[RClassifierModel].to[List]
+  }
+
 }

modules/joex/src/main/scala/docspell/joex/learn/LearnClassifierTask.scala

@@ -4,12 +4,13 @@ import cats.data.Kleisli
 import cats.data.OptionT
 import cats.effect._
 import cats.implicits._
+
 import docspell.analysis.TextAnalyser
 import docspell.backend.ops.OCollective
 import docspell.common._
 import docspell.joex.Config
 import docspell.joex.scheduler._
-import docspell.store.records.{RClassifierSetting, RTag}
+import docspell.store.records.{RClassifierModel, RClassifierSetting, RTag}
 
 object LearnClassifierTask {
   val pageSep = " --n-- "
@@ -31,6 +32,7 @@ object LearnClassifierTask {
         _ <- OptionT.liftF(
           learnAllTagCategories(analyser)(ctx.args.collective, maxItems).run(ctx)
         )
+        _ <- OptionT.liftF(clearObsoleteModels(ctx))
       } yield ())
         .getOrElseF(logInactiveWarning(ctx.logger))
     }
@@ -62,14 +64,27 @@ object LearnClassifierTask {
   ): Task[F, A, Unit] =
     Task { ctx =>
       for {
-        cats <- ctx.store.transact(
-          RTag.listCategories(collective, ClassifierName.noCategory.name)
-        )
+        cats <- ctx.store.transact(RTag.listCategories(collective))
         task = learnTagCategory[F, A](analyser, collective, maxItems) _
         _ <- cats.map(task).traverse(_.run(ctx))
       } yield ()
     }
 
+  private def clearObsoleteModels[F[_]: Sync](ctx: Context[F, Args]): F[Unit] =
+    for {
+      list <- ctx.store.transact(
+        ClassifierName.findOrphanTagModels(ctx.args.collective)
+      )
+      _ <- ctx.logger.info(
+        s"Found ${list.size} obsolete model files that are deleted now."
+      )
+      n <- ctx.store.transact(RClassifierModel.deleteAll(list.map(_.id)))
+      _ <- list
+        .map(_.fileId.id)
+        .traverse(id => ctx.store.bitpeace.delete(id).compile.drain)
+      _ <- ctx.logger.debug(s"Deleted $n model files.")
+    } yield ()
+
   private def findActiveSettings[F[_]: Sync](
       ctx: Context[F, Args],
       cfg: Config.TextAnalysis

modules/store/src/main/scala/docspell/store/records/RClassifierModel.scala

@@ -1,7 +1,7 @@
 package docspell.store.records
 
-import cats.effect._
 import cats.data.NonEmptyList
+import cats.effect._
 import cats.implicits._
 
 import docspell.common._
@@ -63,6 +63,17 @@ object RClassifierModel {
         else 0.pure[ConnectionIO]
     } yield n + k
 
+  def deleteById(id: Ident): ConnectionIO[Int] =
+    DML.delete(T, T.id === id)
+
+  def deleteAll(ids: List[Ident]): ConnectionIO[Int] =
+    NonEmptyList.fromList(ids) match {
+      case Some(nel) =>
+        DML.delete(T, T.id.in(nel))
+      case None =>
+        0.pure[ConnectionIO]
+    }
+
   def findByName(cid: Ident, name: String): ConnectionIO[Option[RClassifierModel]] =
     Select(select(T.all), from(T), T.cid === cid && T.name === name).build
       .query[RClassifierModel]
@@ -75,4 +86,5 @@ object RClassifierModel {
     Select(select(T.all), from(T), T.cid === cid && T.name.in(names)).build
       .query[RClassifierModel]
       .to[List]
+
 }

modules/store/src/main/scala/docspell/store/records/RTag.scala

@@ -148,11 +148,11 @@ object RTag {
     ).orderBy(T.name.asc).build.query[RTag].to[List]
   }
 
-  def listCategories(coll: Ident, fallback: String): ConnectionIO[List[String]] =
+  def listCategories(coll: Ident): ConnectionIO[List[String]] =
     Select(
-      coalesce(T.category.s, lit(fallback)).s,
+      T.category.s,
       from(T),
-      T.cid === coll
+      T.cid === coll && T.category.isNotNull
     ).distinct.build.query[String].to[List]
 
   def delete(tagId: Ident, coll: Ident): ConnectionIO[Int] =